What is a classic sign of atopic dermatitis in infants?

Atopic dermatitis, commonly known as eczema, is a prevalent skin condition in infants characterized by its distinctive symptoms. One of the classic signs of atopic dermatitis in this age group is the presence of pruritic erythematous lesions. These lesions are itchy (pruritic) and red (erythematous), often found on the cheeks, scalp, and the extensor surfaces of the limbs.

In infants, atopic dermatitis usually manifests as dry, itchy skin accompanied by inflammation. Around the cheeks and chin, it may appear as red, scaly patches that can easily become excoriated due to scratching, often leading to secondary infections. This type of skin response is indicative of the atopic diathesis, as these infants have a tendency to develop other allergic conditions such as asthma or allergic rhinitis later in life.

Other options may present skin conditions, but they do not align with the typical presentation of atopic dermatitis. For instance, yellow crusted lesions are more characteristic of impetigo or seborrheic dermatitis, scaly patches on the scalp may indicate conditions like cradle cap, and circular rashes are often associated with conditions like ringworm. Understanding the unique features of atopic dermatitis helps in distinguishing it from